Low Distortion Differential RF/IF Amplifier
Enhanced Product
Rev.
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FEATURES
−3 dB bandwidth of 2.2 GHz for AV = 12 dB
Single-resistor programmable gain: 0 dB ≤ AV ≤ 26 dB
Differential interface
Low noise input stage: 2.70 nV/√Hz at 70 MHz, AV = 10 dB
Low harmonic distortion
−79 dBc second at 70 MHz
−81 dBc third at 70 MHz
Output third-order intercept (OIP3) of 31 dBm at 70 MHz
Single-supply operation: 3 V to 5.5 V
Low power dissipation: 28 mA at 5 V
Adjustable output common-mode voltage
Fast settling and overdrive recovery
Slew rate of 13,000 V/µs
Power-down capability
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Extended industrial temperature range: −55°C to +105°C
Controlled manufacturing baseline
1 assembly/test site
1 fabrication site
Product change notification
Qualification data available upon request
APPLICATIONS
Differential ADC drivers
Single-ended-to-differential conversion
IF sampling receivers
RF/IF gain blocks
Surface acoustic wave (SAW) filter interfacing
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
GENERAL DESCRIPTION
The AD8351-EP is a low cost differential amplifier useful in RF
and IF applications up to 2.2 GHz. The voltage gain can be set
from unity to 26 dB using a single external gain resistor. The
AD8351-EP provides a nominal 150 Ω differential output
impedance. The excellent distortion performance and low noise
characteristics of this device allow a wide range of applications.
The AD8351-EP is designed to satisfy the demanding
performance requirements of communications transceiver
applications. The device can be used as a general-purpose gain
block, an ADC driver, and a high speed data interface driver,
among other functions. The AD8351-EP can also be used as a
single-ended-to-differential amplifier with similar distortion
products as in the differential configuration. The exceptionally
good distortion performance makes the AD8351-EP an ideal
solution for 12-bit and 14-bit IF sampling receiver designs.
Fabricated in the Analog Devices, Inc., high speed XFCB
process, the AD8351-EP has a high bandwidth that provides
high frequency performance and low distortion. The quiescent
current of the AD8351-EP is 28 mA typically. The AD8351-EP
amplifier comes in a 16-lead LFCSP package, and operates over
the temperature range of −55°C to +105°C.
Additional application and technical information can be found
in the AD8351 datasheet.
VOCM
VPOS
OPHI
OPLO
COMM
PWUP
RGP1
INHI
INLO
RGP2
AD8351-EP
BIAS CE LL
14821-001